Switch fabric having a serial communications interface and a parallel communications interface

• US 11,093,427 B2
• Filed: 04/20/2020
• Issued: 08/17/2021
• Est. Priority Date: 12/30/2011
• Status: Active Grant

• Current Assignee: Analog Devices, Inc.
• Original Assignee: Bedrock Automation Platforms, Inc. (Analog Devices, Inc.)
• Inventors: Calvin, James G., Rooyakkers, Albert
• Primary Examiner(s): Tsai, Henry
• Assistant Examiner(s): Daley, Christopher A
• Application Number:
  US16/853,555
• Publication Number:
  US 20200320032A1
• Time in Patent Office: 484 Days
• CPC Class Codes: G06F 13/20 for access to input/output bus
• CPC Class Codes: G06F 13/364 using independent requests or grants, e.g. using separated request and grant lines
• CPC Class Codes: G06F 13/4022 using switching circuits, e.g. switching matrix, connection or expansion network G06F13/4009 takes precedence
• CPC Class Codes: G06F 13/4068 Electrical coupling
• CPC Class Codes: G06F 13/4208 being a system bus, e.g. VME bus, Futurebus, Multibus
• CPC Class Codes: G06F 13/4221 being an input/output bus, e.g. ISA bus, EISA bus, PCI bus, SCSI bus
• CPC Class Codes: G06F 13/4282 on a serial bus, e.g. I2C bus, SPI bus on daisy chain buses G06F13/4247
• CPC Class Codes: G06F 15/16 Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs coordinating program control therefor G06F9/52; in regulating and control system G05B
• CPC Class Codes: G06F 15/17312 Routing techniques specific to parallel machines, e.g. wormhole, store and forward, shortest path problem congestion routing on a LAN H04L45/00
• CPC Class Codes: G06F 2213/0004 Parallel ports, e.g. centronics
• CPC Class Codes: G06F 2213/0022 Multibus
• CPC Class Codes: G06F 2213/0024 Peripheral component interconnect [PCI]

Abstract

A switch fabric is disclosed that includes a serial communications interface and a parallel communications interface. The serial communications interface is configured for connecting a plurality of slave devices to a master device in parallel to transmit information between the plurality of slave devices and the master device, and the parallel communications interface is configured for separately connecting the plurality of slave devices to the master device to transmit information between the plurality of slave devices and the master device, and to transmit information between individual ones of the plurality of slave devices. The parallel communications interface may comprise a dedicated parallel communications channel for each one of the plurality of slave devices. The serial communications interface may comprise a multidrop bus, and the parallel communications interface may comprise a cross switch.

Claims

1. A switch fabric comprising:

a serial communications interface for connecting a plurality of slave devices to a master device in parallel, the serial communications interface configured for transmitting information between the plurality of slave devices and the master device;

a parallel communications interface for separately connecting the plurality of slave devices to the master device, the parallel communications interface configured for simultaneously transmitting information between the plurality of slave devices and the master device, and transmitting information between individual ones of the plurality of slave devices; and

a support frame to facilitate interconnection of the plurality of slave devices and the master device, the support frame comprising a plurality of slots, each slot of the plurality of slots for receiving a respective one of the plurality of slave devices, wherein a slave device coupled with the support frame at a respective slot can identify itself to the master device using a unique identification, the unique identification including at least one of an identifier associated with the slave device or an identifier associated with the respective slot.

2. The switch fabric as recited in claim 1, wherein the parallel communications interface comprises a dedicated parallel communications channel for each one of the plurality of slave devices.

3. The switch fabric as recited in claim 1, wherein the serial communications interface comprises a multidrop bus.

4. The switch fabric as recited in claim 1, wherein the parallel communications interface comprises a cross switch.

5. The switch fabric as recited in claim 1, wherein the serial communications interface and the parallel communications interface are formed on a single printed circuit board.

6. The switch fabric as recited in claim 1, wherein the serial communications interface is configured for connecting the plurality of slave devices to a second master device in parallel, and the parallel communications interface is configured for separately connecting the plurality of slave devices to the second master device.

7. The switch fabric as recited in claim 1, wherein information transmitted via at least one of the serial communications interface or the parallel communications interface is packetized.

8. The switch fabric as recited in claim 1, further comprising a network interface for transmitting information collected from the plurality of slave devices via a network.

9. A process comprising:

coupling a plurality of slave devices and a master device to a support frame in an industrial control system, the support frame comprising a plurality of slots, each slot of the plurality of slots for receiving a respective one of the plurality of slave devices;

connecting the plurality of slave devices to the master device in parallel for transmitting information between the plurality of slave devices and the master device; and

separately connecting the plurality of slave devices to the master device for simultaneously transmitting information between the plurality of slave devices and the master device, and transmitting information between individual ones of the plurality of slave devices, wherein a slave device coupled with the support frame at a respective slot can identify itself to the master device using a unique identification, the unique identification including at least, one of an identifier associated with the slave device or an identifier associated with the respective slot.

10. The process as recited in claim 9, wherein separately connecting the plurality of slave devices to the master device comprises furnishing a dedicated parallel communications channel for each one of the plurality of slave devices.

11. The process as recited in claim 9, wherein connecting the plurality of slave devices to the master device in parallel comprises connecting the plurality of slave devices to the master device using a multidrop bus.

12. The process as recited in claim 9, wherein separately connecting the plurality of slave devices to the master device comprises separately connecting the plurality of slave devices to the master device using a cross switch.

13. The process as recited in claim 9, wherein connecting the plurality of slave devices to the master device in parallel and separately connecting the plurality of slave devices to the master device comprises connecting the plurality of slave devices to the master device using a single printed circuit board.

14. The process as recited in claim 9, further comprising:

connecting the plurality of slave devices to a second master device in parallel; and

separately connecting the plurality of slave devices to the second master device.

15. The process as recited in claim 9, wherein at least one of transmitting information between the plurality of slave devices and the master device or transmitting information between individual ones of the plurality of slave devices comprises packetizing the transmitted information.

16. A switch assembly comprising:

a multidrop bus for connecting a plurality of slave devices to a master device in parallel, the multidrop bus configured for transmitting information between the plurality of slave devices and the master device;

a cross switch for separately connecting the plurality of slave devices to the master device, the cross switch configured for simultaneously transmitting information between the plurality of slave devices and the master device, and transmitting information between individual ones of the plurality of slave devices; and

a support frame to facilitate interconnection of the plurality of slave devices and the master device, the support frame comprising a plurality of slots, each slot of the plurality of slots for receiving a respective one of the plurality of slave devices, wherein a slave device coupled with the support frame at a respective slot can identify itself to the master device using a unique identification associated with the respective slot, the unique identification including at least one of an identifier associated with the slave device or an identifier associated with the respective slot.

17. The switch assembly as recited in claim 16, wherein the multidrop bus and the cross switch are formed on a single printed circuit board.

18. The switch assembly as recited in claim 16, wherein the multidrop bus is configured for connecting the plurality of slave devices to a second master device in parallel, and the cross switch is configured for separately connecting the plurality of slave devices to the second master device.

19. The switch assembly as recited in claim 16, wherein information transmitted via at least one of the multidrop bus or the cross switch is packetized.

20. The switch assembly as recited in claim 16, further comprising a network interface for transmitting information collected from the plurality of slave devices via a network.